"joe" I'm thinking that IF there were rollers under the bed and that IF they traveled over the carpet you would be able to see some marks caused by the rollers immediately after moving the slide. One word of caution here: I have seen one RV/TT in which the owner pulled up the carpet and put down wood flooring. The problem was that the flooring was thicker than the carpet so the slide would not work with this thicker flooring. Yep, he had to rip up all the flooring he glued down to redo the flooring again with thinner flooring material. He had the thick flooring left over from a flooring job he did. This was real hardwood about 5/8" thick and he glued it well. He opted for what he called "the cheap stuff" from an apron store but it worked well.